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-\ G. BOVENSIEPEN.

Patented Aug. 30, |898.

PROCESS 0F AND APPARATUS FOR HARDENING POINTS 0F CARDS.

(Application filed Oct. 11, 1897.) N o M o d el 2 Sheets-Sheet l.

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No. e|o,o22. Patenten Aug. so, |898. a. BovENslEPEN. PROCESS 0F ANDAPPARATUS FOR HARDENING PINTS 0F CARDS.

(Application filed Oct. 11, 1897.) (No Model.) 2 Sheets-Sheet 2.

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which passes a screw-shank CZ'.

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GUSTAV BOVENSIEPEN, OF METTMANN, GERMANY.`

PROCESS OF AND APPARATUS FQR HARDENING POINTS 0F CARDS.

SPECIFICATION forming part of Letters Patent No. 610,022, dated August30, 1898.

Application filed October 11,1897. Serial No. 654,754. (No model.)Patented in Belgium January 12, 1897, No. 125,685; in France January 12; 1897, No. 263,027; in Austria January 16, 1897, No. 47/2,702; inItaly January 19, 15897, No. 43,663; in England January 20, 1897, No.1,579, and in Switzerland January 25, 1897, No. 13,694.

To all whom t may concern:

Be it. known lthat I, GUsrAv BovENsIEPEN, a subject of the GermanEmperor, residing at Mettmann, Rhenish Prussia, Germany, have inventednew and useful Improvements in Processes of and Apparatus for Hardeningthe Points of Cards, (for which I have 0btained the following patents:in Belgium, No. 125,685, dated January 12,1897; in France,1\l0.V263,027, dated January 12, 1897; in Austria, No,47/2,702, dated January16, 1897; in England, No. 1,579, dated January 20, 1897; in Italy, No.43,663, dated January 19, 1897, and in Switzerland, No. 13,694, datedJanuary 25, 1897,) of which the following is a specication.

This invention relates to improved means for hardening the points ofcarding-teeth by first glowing, then cooling, and finally drying theteeth, while the body of the band is cooled during the time the teethare glowed. In this way a card-band of superior quality is obtained. v

In the accompanying drawings, Figurel is a vertical longitudinal sectionof an apparatus embodying my invention. Fig. 2 is a plan of the samewith the card-band removed.

The card-band A is first engaged by a brake mechanism c c2 to receivethe proper tension. It then passes over an upper adjustable guideroll aand over a lower hollow cooling tube or body ZJ, located directly overcooling-tank B, and is iinally engaged by a feed-roller w, driven insuitable manner. The brake mechanism consists of a lower table c and ofan uppermovable shoe c2, through each end of This screwshank carries atits lower end a Winged nut f2 and is surrounded by a spring f', bearingagainst a fixed abutment f. The upper ends 0I" the screw-Shanks CZ carrya cross-rail CZ, provided with pins e, that engage conical openings inthe upper side of shoe c2. By manipulating the nuts f2 the pressureexerted by the shoe upon the carding-band may thus be readily adjusted.

The cooling-tank B is divided into two compartments ac y by a partitionZL. The forward compartment y contains the cooling or hardening bath, ofwater or other liquid. This liquid isadmitted at cock h', Fig. 2, flowsfirst through the tube Z9 to cool the same, and

is thence discharged into compartment y through branch b2. From thecompartment y the bath overflows partition'h to iill the rearcompartment :c and cool the reservoir e" of a Bunsen burner i' thereincontained.

A stand-pipe Zo is arranged with its mouth above the level of reservoirfi', so that the latter is always submerged. At its lower end thecompartment y communicates by drain 7c', having cock k2, with thedischarge-pipe Zt. If the compartment y is to be drained, the cock 7a2is opened, so that the water from compartment 'y will enter and iiow outof the lower end of pipe Za.

The guide-roll a is horizontally adjustable within its bearings, so thatthe angle at which the card is fed to the cooling-tube and the length ofthe way which the carding-teeth describe through the flame may beincreased or diminished at pleasure.

The reservoir i' is supplied with a mixture of compressed air and gasthrough pipe Z2, so that ample oxygen to insure perfect combustion isprovided. The compressed air is supplied to pipe Z2 by branch Z, havingcock Z5, while the gas is supplied by branch Z, having cock Z4. Abaffle-plate 2 is arranged within reservoir e" between the burnerz' andthe supply-pipe Z2 in order to shield the burner from the direct actionof the current oi' compressed fuel.

In order to dry the card-teeth after having passed out of thehardening-bath, I arrange a tube m a short distance in front of tube ZJand below the lower side of band A. The tube m is perforated on itsupper side and is supplied with compressed air from branch Z by means ofconnection Z5. The compressed air is thus ejected against thecard-teeth, which are still somewhat warm, and will dry the samerapidly,

The card-band A is held against the feedroller w by means offriction-rolls n2, journaled in arms n. These arms are pivoted to leversn' and are drawn toward the feed-roller w by means of springs n3, sothat a perfect en gagement between the feed-roller and the card-band iseffected.

IOO

The operation is as follows: brake c' c2 the card-band travels overroller a, thence downwardly over tube b, and thence forwardly to thefeed-roller w. Immediately back of tube b the points of the teeth on thedescending band are glowed for a longer or shorter length, according tothe adjustment of the guide-roll ct. Simultaneously with the heating ofthe points the carding-cloth and those parts of the teeth which are heldthereby are cooled by the cooling-surface of tube b without beingmoistened. After the points of the cards have cleared the burner theyimmediately enter the bath y to be hardened,and then they are dried bythe air-jets ejected from tube m.

vlThe feed-roller w may be provided with a covering w of rubber or otherelastic material, which protects the card-band against slipping.

What I claim isl. The process of hardening card-teeth secured in acard-band, which consists in glowing the teeth, simultaneously coolingthe band, immersing the points of the teeth into a hardening-bath, andthen drying the teeth by air-jets, substantially as specified.

2. An apparatus for hardening card-teeth secured in a card-band, whichconsists of a hollow cooling-body that engages the cardband, means forsupplying a cooling medium to the interior of said body, a burner placedin proximity to such body, a vessel adapted to contain a hardeningbath,into which the points of the card-teeth enter after having passed theburner, and means for feeding the card-band, substantially. as specied.

3. An apparatus for hardening card-teeth secured in a card-band, whichconsists of an upper adjustable guide-roll, a lower hollow cooling-body,means for supplying a cooling medium to the interior of said body, aburner placed in proximity to such body, a vessel From the adapted tocontain a hardening-bath int'o which the points of the card-teeth enterafter having passed the burner, and means for feeding the card-band,substantially as specified.

4. An apparatus for hardening card-teeth secured in a card-band, whichconsists of a brake mechanism, a guide-roll in the rear thereof, acooling-body beneath the guideroll, a burner placed in proximity to thecooling-body, a vessel adapted to contain a cooling-bath placedunderneath the same, and means for feeding the card-band, substantiallyas specified.

5. An apparatus for hardening card-teeth secured in a card-band, whichconsists of a hollow cooling-body that engages the cardband, means forsupplying a cooling medium to the interior of said body, a burner placedin proximity to the cooling-body, a vessel adapted to contain a bathplaced underneath the same, a perforated tube adapted to throwdrying-jets upon the teeth after their emergence from the bath, andmeans for feeding the card-band, substantially as specified.

6. In an apparatus for hardening card-teeth secured in a cardeband, ahollow cooling-body, means for supplying a cooling medium to theinterior of the same, aBunsen burner placed in proximity to said body,means for supplying gas and air to said burner, a Vessel adapted tocontain a hardening-bath placed underneath the cooling-body, and meansfor feeding the card-band, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GUSTAV BOVENSIEPEN.

Witnesses:

R. E. J AHN, OTTO KNIG.

